iofunc_attr_unlock()

Unlock the attribute structure

Synopsis:

#include <sys/iofunc.h>

int iofunc_attr_unlock( iofunc_attr_t *attr );

Arguments:

attr: A pointer to the iofunc_attr_t structure that you want to unlock.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The iofunc_attr_unlock() function unlocks the attribute structure attr, allowing other threads in the resource manager to change information.

Use this function in conjunction with iofunc_attr_lock() or iofunc_attr_trylock(); call iofunc_attr_unlock() after you've made modifications to the attribute structure. You must unlock the structure as many times as you locked it.

Returns:

EOK: Success.
EAGAIN: On the first use, all kernel mutex objects were in use.

Classification:

QNX Neutrino

Safety:
Cancellation point	No
Interrupt handler	No
Signal handler	Yes
Thread	Yes

Related links

iofunc_attr_init()
Initialize the per-name attribute structure associated with a device
iofunc_attr_lock()
Lock the attribute structure
iofunc_attr_t
I/O attribute structure
iofunc_attr_trylock()
Try to lock the attribute structure

Last modified: 2013-09-30

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